French President Emmanuel Macron’s party, La Republique En Marche, won a resounding victory Sunday in the final round of the country’s parliamentary elections, gaining a commanding majority in the National Assembly.
The victory, which dramatically reshapes French politics, is particularly remarkable given that Macron’s party is just a year old and many of its elected representatives are new to government. Macron himself was practically unknown a year ago. But amid a fracturing of support for...